A honeycomb boron carbide resin composite neutron absorption plate and its preparation method

Abstract

The present invention discloses a honeycomb boron carbide resin composite neutron absorption plate with a small overall density, adjustable thickness, low energy consumption, and low comprehensive preparation cost, and a preparation method thereof. The honeycomb boron carbide resin composite neutron absorption plate comprises a bottom plate, a honeycomb plate, and a sealing plate which are sequentially arranged from bottom to top; the honeycomb plate is provided with honeycomb holes; the honeycomb holes are filled with an absorption material; the absorption material includes: boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, kaolin; the preparation method of the honeycomb boron carbide resin composite neutron absorption plate includes S1, mixing boron carbide powder, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin evenly to obtain a mixture A; S2, mixing the mixture A with the resin in a liquid state and stirring evenly, and filling the honeycomb holes; S3, arranging a sealing plate and a bottom plate on the upper and lower surfaces of the aluminum honeycomb plate. By adopting the honeycomb boron carbide resin composite neutron absorption plate and the preparation method thereof, the absorption effect can be ensured, and the process is simple.

Description

Technical Field

[0001] The present invention relates to a composite absorber plate, in particular to a honeycomb boron carbide resin composite neutron absorber plate. Background Art

[0002] As is well known: Traditional neutron absorber plates are made by uniformly dispersing boron carbide in an aluminum alloy matrix through casting or sintering, and then rolling and compounding.

[0003] In the preparation process of the existing boron carbide aluminum matrix composite material, it needs to go through a high-temperature environment, with high energy consumption; boron carbide is a ceramic phase and is not easy to combine with the aluminum alloy of the metal phase, resulting in uneven distribution and a very limited addition amount, leading to poor neutron shielding performance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a honeycomb boron carbide resin composite neutron absorber plate and its preparation method with a small overall density of the absorber plate, adjustable thickness, low energy consumption, simple process, and low comprehensive preparation cost.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A honeycomb boron carbide resin composite neutron absorber plate, including a bottom plate, a honeycomb plate, and a sealing plate arranged in sequence from bottom to top; the honeycomb plate has honeycomb holes; there are rib plates between adjacent honeycomb holes; a hollow structure is arranged on the rib plates;

[0006] The honeycomb holes are filled with an absorption material; the absorption material includes: boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, kaolin;

[0007] The weight parts of each component of the absorption material are as follows:

[0008] 32 - 75 parts of boron carbide powder;

[0009] 10 - 40 parts of resin;

[0010] 1 - 5 parts of flaky aluminum powder or aluminum alloy powder;

[0011] 1 - 5 parts of flake graphite;

[0012] 1 - 2 parts of kaolin.

[0013] Further, the particle size of the boron carbide powder is 5 - 50 μm, the thickness of the flaky aluminum powder or aluminum alloy powder is 6 - 100 μm, the particle size is 200 - 2000 μm, the particle size of the flake graphite is 10 - 200 μm, and the particle size of the kaolin is 1 - 10 μm.

[0014] Further, the honeycomb panel is made of an aluminum honeycomb panel; the weight parts of the aluminum honeycomb panel, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin are as follows:

[0015] 32 - 75 parts of boron carbide powder;

[0016] 10 - 40 parts of resin;

[0017] 20 - 30 parts of aluminum honeycomb panel;

[0018] 1 - 5 parts of flaky aluminum powder or aluminum alloy powder;

[0019] 1 - 5 parts of flake graphite;

[0020] 1 - 2 parts of kaolin.

[0021] Preferably, the resin is an epoxy resin.

[0022] Further, the cross - section of the honeycomb holes is polygonal or circular.

[0023] Preferably, both the bottom plate and the sealing plate are made of aluminum alloy plates.

[0024] The present invention also provides a preparation method of the honeycomb boron carbide resin composite neutron absorber plate as described above, including the following steps:

[0025] S1. Mix boron carbide powder, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin evenly to obtain mixture A;

[0026] S2. Mix mixture A with the resin in a liquid state and stir well, and fill it into the honeycomb holes of the honeycomb panel, and wait for it to cure;

[0027] S3. Then connect the sealing plate and the bottom plate to the upper and lower surfaces of the aluminum honeycomb panel respectively by bonding or welding to form a honeycomb boron carbide resin composite neutron absorber plate.

[0028] The beneficial effects of the present invention are as follows: For the honeycomb boron carbide resin composite neutron absorber plate of the present invention, due to the high boron carbide content and more uniform distribution, the overall density of the absorber plate is small, and the absorption effect can be guaranteed; the absorption rate can reach more than 90%; secondly, the thickness can be adjusted during the preparation process.

[0029] Thirdly, the preparation method of the honeycomb boron carbide resin composite neutron absorber plate of the present invention has no high - temperature heating link during the preparation process, has low energy consumption, simple process, and low comprehensive preparation cost. Description of the Drawings

[0030] Figure 1 is a three - dimensional view of the honeycomb boron carbide resin composite neutron absorber plate in the embodiment of the present invention;

[0031] Figure 2 It is an explosion schematic diagram of the honeycomb boron carbide resin composite neutron absorber plate in the embodiment of the present invention;

[0032] Figure 3 It is a partial cross-sectional view of the honeycomb boron carbide resin composite neutron absorber plate in the embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the internal structure of the honeycomb boron carbide resin composite neutron absorber plate in the embodiment of the present invention;

[0034] In the figure: 1-bottom plate, 2-honeycomb plate, 3-sealing plate, 4-honeycomb hole, 5-rib plate, 6-hollow structure. Detailed implementation manners

[0035] The present invention will be further described below in conjunction with the drawings and embodiments.

[0036] As Figure 1 , Figure 2 shown, the honeycomb boron carbide resin composite neutron absorber plate of the present invention includes a bottom plate 1, a honeycomb plate 2, and a sealing plate 3 arranged in sequence from bottom to top; the honeycomb plate 2 has honeycomb holes 4; there are rib plates 5 between adjacent honeycomb holes 4; a hollow structure 6 is arranged on the rib plate 5;

[0037] The honeycomb holes 4 are filled with an absorption material; the absorption material includes: boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, kaolin; among them, the honeycomb plate 2 is made of an aluminum honeycomb plate; the resin is made of epoxy resin; and the honeycomb plate 2 is made of an aluminum honeycomb plate; the weight parts of the aluminum honeycomb plate, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin are:

[0038] Boron carbide powder 32-75 parts;

[0039] Resin 10-40 parts;

[0040] Aluminum honeycomb plate 20-30 parts;

[0041] Flaky aluminum powder or aluminum alloy powder 1-5 parts;

[0042] Flake graphite 1-5 parts;

[0043] Kaolin 1-2 parts.

[0044] The particle size of the boron carbide powder is 5-50 μm, the thickness of the flaky aluminum powder or aluminum alloy powder is 6-100 μm, the particle size is 200-2000 μm, the particle size of the flake graphite is 10-200 μm, and the particle size of the kaolin is 1-10 μm.

[0045] The cross-section of the honeycomb holes 4 is polygonal or circular. Both the bottom plate 1 and the sealing plate 3 are made of aluminum alloy plates.

[0046] In the process of preparing the honeycomb boron carbide resin composite neutron absorber plate, the following steps are included:

[0047] S1. Mix boron carbide powder, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin evenly to obtain mixture A;

[0048] S2. Mix mixture A with the resin in a liquid state and stir well, and fill it into the honeycomb holes of the honeycomb plate, and wait for it to cure;

[0049] S3. Then connect the sealing plate 3 and the bottom plate 1 to the upper and lower surfaces of the aluminum honeycomb plate by bonding or welding respectively to form a honeycomb boron carbide resin composite neutron absorber plate.

[0050] In the honeycomb boron carbide resin composite neutron absorber plate of the present invention, the boron isotope B10 in boron carbide has a large neutron absorption cross-section and can be used as a neutron absorber in neutron absorption materials.

[0051] Secondly, carbon has a high neutron reflection cross-section. Adding flake graphite to boron carbide particles can increase the emission times of neutrons in the absorption material; at the same time, graphite has a high thermal conductivity and can timely conduct the heat generated during the neutron absorption process. Aluminum and aluminum alloys have a high thermal conductivity. Adding flaky aluminum powder or aluminum alloy powder to boron carbide particles can also timely conduct the heat generated during the neutron absorption process. The aluminum honeycomb plate has a regular structure, low density, high specific strength, impact resistance, and easy processing. The regular grid spaces of the aluminum honeycomb plate can be used as a forming carrier for the mixture of boron carbide, flake graphite, flaky aluminum powder or aluminum alloy powder, and other additional materials, significantly improving the dispersion uniformity of boron carbide in neutron absorption materials. Epoxy resin has a high hydrogen element content and can be used as a neutron moderation and shielding material. More importantly, epoxy resin can simply cast and form the mixture of boron carbide, flake graphite, flaky aluminum powder or aluminum alloy powder that has been mixed evenly.

[0052] Secondly, since there are rib plates 5 between adjacent honeycomb holes 4; a hollow structure 6 is provided on the rib plates 5; therefore, the honeycomb holes can form a whole to increase the filling amount of the honeycomb plate 2, and ensure uniform filling of the absorption material and improve the absorption effect.

[0053] Example 1

[0054] The honeycomb boron carbide resin composite neutron absorber plate of the present invention includes a bottom plate 1, a honeycomb plate 2, and a sealing plate 3 arranged in sequence from bottom to top; the honeycomb plate 2 has honeycomb holes 4;

[0055] The honeycomb holes 4 are filled with an absorbent material; the absorbent material includes: boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, kaolin; wherein, the honeycomb panel 2 is made of an aluminum honeycomb panel; the resin is an epoxy resin; and the honeycomb panel 2 is made of an aluminum honeycomb panel; the weight parts of the aluminum honeycomb panel, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite and kaolin are as follows:

[0056] 32 parts of boron carbide powder;

[0057] 10 parts of epoxy resin;

[0058] 20 parts of aluminum honeycomb panel;

[0059] 1 part of flaky aluminum powder or aluminum alloy powder;

[0060] 1 part of flake graphite;

[0061] 1 part of kaolin.

[0062] The particle size of the boron carbide powder is 5 - 50 μm, the thickness of the flaky aluminum powder or aluminum alloy powder is 6 - 100 μm, the particle size is 200 - 2000 μm, the particle size of the flake graphite is 10 - 200 μm, and the particle size of the kaolin is 1 - 10 μm. The cross-section of the honeycomb hole 4 is polygonal or circular; both the bottom plate 1 and the sealing plate 3 are made of aluminum alloy plates.

[0063] During the preparation process:

[0064] S1. Mix the boron carbide powder, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin evenly to obtain mixture A;

[0065] S2. Mix mixture A with the resin in a liquid state and stir well, and fill it into the honeycomb holes of the honeycomb panel, and wait for it to cure;

[0066] S3. Then connect the sealing plate 3 and the bottom plate 1 to the upper and lower surfaces of the aluminum honeycomb panel by bonding or welding respectively to form a honeycomb boron carbide resin composite neutron absorber plate.

[0067] The prepared honeycomb boron carbide resin composite neutron absorber plate is tested for neutron absorption, and finally an absorption effect of 91% is obtained.

[0068] Example 2

[0069] The components and preparation method of the honeycomb boron carbide resin composite neutron absorber plate are the same as those in Example 1, the difference is:

[0070] The weight parts of the aluminum honeycomb panel, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite and kaolin are as follows:

[0071] 40 parts of boron carbide powder;

[0072] 30 parts of epoxy resin;

[0073] 25 parts of aluminum honeycomb panel;

[0074] 2 parts of flaky aluminum powder or aluminum alloy powder;

[0075] 3 parts of flake graphite;

[0076] 1.5 parts of kaolin.

[0077] The prepared honeycomb boron carbide resin composite neutron absorber plate was subjected to neutron absorption test, and finally an absorption effect of 93% was obtained.

[0078] Example 2

[0079] The components and preparation method of the honeycomb boron carbide resin composite neutron absorber plate are the same as those in Example 1, except that:

[0080] The weight parts of the aluminum honeycomb panel, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite and kaolin are as follows:

[0081] 75 parts of boron carbide powder;

[0082] 40 parts of epoxy resin;

[0083] 30 parts of aluminum honeycomb panel;

[0084] 5 parts of flaky aluminum powder or aluminum alloy powder;

[0085] 5 parts of flake graphite;

[0086] 3 parts of kaolin.

[0087] The prepared honeycomb boron carbide resin composite neutron absorber plate was subjected to neutron absorption test, and finally an absorption effect of 95% was obtained.

Claims

1. A honeycomb boron carbide resin composite neutron absorption plate, characterized in that: It includes a bottom plate (1), a honeycomb plate (2), and a sealing plate (3) arranged successively from bottom to top; the honeycomb plate (2) has honeycomb holes (4); there are rib plates (5) between adjacent honeycomb holes (4); a hollow structure (6) is arranged on the rib plate (5); Absorbent material is filled in the honeycomb holes (4); the absorbent material includes: boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, kaolin; The weight parts of each component of the absorbent material are as follows: 32 - 75 parts of boron carbide powder; 10 - 40 parts of resin; 1 - 5 parts of flaky aluminum powder or aluminum alloy powder; 1 - 5 parts of flake graphite; 1 - 2 parts of kaolin.

2. The honeycomb boron carbide resin composite neutron absorption plate according to claim 1, characterized in that: The particle size of the boron carbide powder is 5 - 50 μm, the thickness of the flaky aluminum powder or aluminum alloy powder is 6 - 100 μm, the particle size is 200 - 2000 μm, the particle size of the flake graphite is 10 - 200 μm, and the particle size of the kaolin is 1 - 10 μm.

3. The honeycomb boron carbide resin composite neutron absorption plate according to claim 2, characterized in that: The honeycomb plate (2) uses an aluminum honeycomb plate; the weight parts of the aluminum honeycomb plate, boron carbide powder, resin, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin are as follows: 32 - 75 parts of boron carbide powder; 10 - 40 parts of resin; 20 - 30 parts of aluminum honeycomb plate; 1 - 5 parts of flaky aluminum powder or aluminum alloy powder; 1 - 5 parts of flake graphite; 1 - 2 parts of kaolin.

4. The honeycomb boron carbide resin composite neutron absorption plate according to claim 3, characterized in that: The resin uses epoxy resin.

5. The honeycomb boron carbide resin composite neutron absorption plate according to claim 4, characterized in that: The cross-section of the honeycomb hole (4) is polygonal or circular.

6. The honeycomb boron carbide resin composite neutron absorption plate according to claim 5, characterized in that: Both the bottom plate (1) and the sealing plate (3) use aluminum alloy plates.

7. The preparation method of the honeycomb boron carbide resin composite neutron absorption plate according to any one of claims 1 to 6, characterized in that, It includes the following steps: S1. Mix boron carbide powder, flaky aluminum powder or aluminum alloy powder, flake graphite, and kaolin evenly to obtain mixture A; S2. Mix mixture A with the resin in a liquid state and stir well, and fill it in the honeycomb holes of the honeycomb plate, and wait for it to cure; S3. Then connect the sealing plate (3) and the bottom plate (1) to the upper and lower surfaces of the honeycomb plate by bonding or welding respectively to form a honeycomb boron carbide resin composite neutron absorber plate.

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